Battery shell and single battery

Abstract

The utility model discloses a battery shell and a single battery. The external space of the battery can be saved, so that a pole component does not protrude out of the side surface. The battery shell comprises a shell body, a cover plate and a pole assembly, the shell body comprises a bottom plate and a side plate surrounding the outer periphery of the bottom plate, the bottom plate and the side plate jointly define a containing cavity with an opening, the bottom plate is provided with a first side edge, and the portion, close to the first side edge, of the bottom plate is concaved towards the containing cavity to form a step structure. The cover plate is arranged at the opening and used for sealing the opening, and the pole assembly is installed on the step structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to battery shell that is single cell. BACKGROUND

[0002] The single cell is composed of a shell, a pole assembly and a cell, the pole assembly is usually installed on the side with smaller area of the shell, the layout space is limited, the pole assembly is usually arranged in a protruding manner on the side, which occupies space and is not conducive to the assembly of the battery.

[0003] Therefore, there is an urgent need for a battery shell and a single cell that can save the external space of the battery and make the pole assembly not protrude from the side to overcome the above-mentioned defects. SUMMARY

[0004] The utility model discloses a battery shell that can save the external space of the battery and make the pole assembly not protrude from the side.

[0005] Another object of the utility model is to provide a single cell that can save the external space of the battery and make the pole assembly not protrude from the side.

[0006] To achieve the above-mentioned object, the battery shell provided by the utility model comprises a shell, a cover plate and a pole assembly, the shell comprises a bottom plate and a side plate surrounding the outer periphery of the bottom plate, the bottom plate and the side plate jointly define a containing cavity with an opening, the bottom plate has a first side edge, the part of the bottom plate adjacent to the first side edge is recessed into the containing cavity and forms a step structure, the cover plate is arranged at the opening for closing the opening, and the pole assembly is installed on the step structure.

[0007] Preferably, the bottom plate further has a second side edge and a third side edge adjacent to the first side edge, and the two ends of the step structure extend to the second side edge and the third side edge respectively.

[0008] Preferably, the step structure is provided with a mounting through hole, and the pole assembly is installed in the mounting through hole.

[0009] Preferably, the pole assembly comprises a pole and a first insulating piece, the pole is arranged in the mounting through hole, at least one end of the pole forms a limiting flange, the first insulating piece is sleeved on the pole and arranged between the limiting flange and the step structure, and the first insulating piece insulates the pole from the shell.

[0010] Preferably, the pole assembly comprises a pole, a first insulating piece, a metal gasket and a second insulating piece, the two ends of the pole form a first limiting flange and a second limiting flange respectively, the first limiting flange is arranged outside the shell, the second limiting flange is arranged in the containing cavity, the metal gasket is sleeved on the pole and arranged outside the shell, the metal gasket is connected to the first limiting flange, the first insulating piece is arranged between the metal gasket and the step structure, and the second insulating piece is sleeved on the pole and arranged between the second limiting flange and the step structure.

[0011] Preferably, a second insulating member is further arranged between the second limiting flange and the side plate.

[0012] Preferably, the second insulating member comprises a cylindrical portion, a ring-shaped portion and a blocking piece portion, the cylindrical portion is sleeved on the pole, the lower end of the cylindrical portion penetrates through the first insulating member and is connected to the metal gasket, the ring-shaped portion is connected to the upper end of the cylindrical portion, the ring-shaped portion is arranged between the second limiting flange and the step structure, and the blocking piece portion is connected to the ring-shaped portion and arranged between the second limiting flange and the side plate.

[0013] Preferably, the step structure or the side plate is further provided with a liquid injection through hole, the liquid injection through hole is detachably provided with a sealing nail, and the outer peripheral edge of the cover plate is provided with an engaging step, and the engaging step of the cover plate is connected and fixed with the side plate.

[0014] To achieve the second purpose, the single battery comprises the battery shell.

[0015] Preferably, the cell comprises a first polarity tab and a second polarity tab, the first polarity tab is electrically connected with the pole assembly, and the second polarity tab is electrically connected with the step structure.

[0016] Compared with the prior art, the step structure is formed in the bottom plate, the pole assembly is arranged on the step structure, the step structure is arranged in a concave manner, the step structure can provide a space for the pole assembly, the pole assembly does not protrude from the bottom surface of the bottom plate, thereby the thickness of the battery shell can be compressed, the pole assembly is arranged on the step structure, the cell is arranged in the accommodating cavity and located on one side of the step structure, and the coating area of the cell is not affected. In addition, the step structure is arranged on the portion adjacent to the first side edge of the bottom plate, the bottom plate is not flat, and the step structure is equivalent to adding a reinforcing rib to the bottom plate, thereby the structural strength of the bottom plate is improved. In addition, the pole assembly is arranged on the step structure, the tab of the cell can be directly welded with the pole assembly, the tab does not need to be bent, the production and processing are facilitated, and the production efficiency is improved. Therefore, the step structure can save the external space of the battery and make the pole assembly not protrude from the side surface. It can be understood that the single battery also has the above effects. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the single battery of the utility model.

[0018] Figure 2 is a perspective view of the single battery of the utility model at another angle.

[0019] Figure 3 is a perspective exploded view of the single battery of the utility model.

[0020] Figure 4This is a perspective view of the single battery cell of this utility model after the cover plate is hidden.

[0021] Figure 5 When the battery casing of this utility model is used with the second type of terminal assembly, along... Figure 2 A partial sectional view obtained after cutting the KK line segment.

[0022] Figure 6 This is a perspective view of the battery casing of this utility model when the second structural form of the terminal post assembly is applied, and after the cover plate is hidden, the terminal post assembly is disassembled.

[0023] Figure 7 This is a perspective view of the battery casing of this utility model when the first type of terminal assembly is used and the first installation method is adopted, and after the cover plate is hidden.

[0024] Figure 8 It is along Figure 7 A partial sectional view obtained by cutting the MM line segment.

[0025] Figure 9 yes Figure 8 The structure shown is a partial cross-sectional view of the pole assembly when the second installation method is used.

[0026] Figure 10 This is a perspective view of a single cell of this utility model with the liquid injection hole located on the side plate. Detailed Implementation

[0027] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] like Figures 1 to 6 As shown, this utility model provides a single-cell battery 100, including a battery casing 10 and a battery cell 20. The battery casing 10 includes a housing 11, a cover plate 12, and an electrode assembly 13. The housing 11 includes a bottom plate 111 and a side plate 112 surrounding the outer periphery of the bottom plate 111. The bottom plate 111 and the side plate 112 together define an accommodating cavity 113 with an opening. The bottom plate 111 has a first side A, and a portion of the bottom plate 111 adjacent to the first side A is recessed into the accommodating cavity 113 to form a stepped structure 114. The cover plate 12 is disposed at the opening to close it, and the electrode assembly 13 is mounted on the stepped structure 114.

[0029] The utility model discloses a step structure 114 is formed to the recess in bottom plate 111, and the pole post assembly 13 is installed in step structure 114, because step structure 114 is recessed arrangement, and step structure 114's setting can provide the placement space for pole post assembly 13, and pole post assembly 13 will not protrude from the bottom surface of bottom plate 111, thereby can compress the thickness size of battery shell 10, and pole post assembly 13 is installed in step structure 114, and the electric core 20 is installed in the accommodation cavity 113 and is located one side of step structure 114, will not influence the coating area of electric core 20.

[0030] Preferably, the shell 11 and the cover plate 12 are made of hardware material, such as stainless steel structure or alloy structure. The wall thickness of the battery shell 10 is in the range of 0.1mm-5mm, but is not limited thereto.

[0031] As shown in Figure 1 , Figure 3 and Figure 6 , the bottom plate 111 also has a second side B and a third side C adjacent to the first side A. The two ends of the step structure 114 extend to the second side B and the third side C, at this time the step structure 114 is equal in length to the first side A, which facilitates the installation and arrangement of the pole post assembly 13 and also helps to strengthen the structural strength of the bottom plate 111.

[0032] As shown in Figures 1 to 6 , the step structure 114 is provided with a mounting through hole 1141, and the pole post assembly 13 is installed in the mounting through hole 1141. The mounting through hole 1141 facilitates the installation of the pole post assembly 13. Preferably, the mounting through hole 1141 is a circular through hole, but is not limited thereto.

[0033] The utility model discloses two kinds of structure forms of pole post assembly 13, and the following first introduces the pole post assembly 13 of the first structure form, and it is worth mentioning that the pole post assembly 13 of the first structure form also has two kinds of installation modes. As shown in Figure 7 , Figure 8 and Figure 9As shown, the pole post assembly 13 of the first structure includes a pole post 131 and a first insulating member 132, the pole post 131 is arranged in the mounting through hole 1141, at least one end of the pole post 131 is formed with a limiting flange 1311, the first insulating member 132 is sleeved on the pole post 131 and arranged between the limiting flange 1311 and the step structure 114, and the first insulating member 132 insulates the pole post 131 from the shell 11. The limiting flange 1311 is arranged to facilitate the positioning of the first insulating member 132. It is worth noting that the pole post 131 is spaced apart from the side wall of the mounting through hole 1141 and a certain space is arranged therebetween to achieve atmospheric environment insulation. During installation, the limiting flange 1311 can be arranged in the accommodating cavity 113, and the state is as shown in Figure 7 and Figure 8 As shown, this is the first installation mode. According to actual needs, the limiting flange 1311 can also be arranged outside the shell 11, and the state is as shown in Figure 9 As shown, this is the second installation mode.

[0034] The following describes the pole post assembly 13 of the second structure. As shown in Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The pole post assembly 13 of this structure includes a pole post 131, a first insulating member 132, a hardware gasket 133 and a second insulating member 134. The two ends of the pole post 131 are respectively formed with a first limiting flange 1311` and a second limiting flange 1312, the first limiting flange 1311` is arranged outside the shell 11, and the second limiting flange 1312 is arranged in the accommodating cavity 113. The hardware gasket 133 is sleeved on the pole post 131 and arranged outside the shell 11, the hardware gasket 133 is connected to the first limiting flange 1311`, the first insulating member 132 is arranged between the hardware gasket 133 and the step structure 114, and the second insulating member 134 is sleeved on the pole post 131 and arranged between the second limiting flange 1312 and the step structure 114. The arrangement of the hardware gasket 133 helps to strengthen the installation stability and the conduction effectiveness of the pole post 131. The arrangement of the first insulating member 132 and the second insulating member 134 helps to ensure the insulation between the pole post 131 and the shell 11.

[0035] To further improve the insulation effect between the pole 131 and the shell 11, the second insulating piece 134 is further arranged between the second limiting flange 1312 and the side plate 112, which also realizes the insulation between the second limiting flange 1312 and the side plate 112. Specifically, the second insulating piece 134 includes a cylindrical portion 1341, a ring-shaped portion 1342 and a baffle portion 1343, the cylindrical portion 1341 is sleeved on the pole 131, the lower end of the cylindrical portion 1341 passes through the first insulating piece 132 and is connected to the metal gasket 133, the ring-shaped portion 1342 is connected to the upper end of the cylindrical portion 1341, the ring-shaped portion 1342 is arranged between the second limiting flange 1312 and the step structure 114, and the baffle portion 1343 is connected to the ring-shaped portion 1342. The baffle portion 1343 is arranged between the second limiting flange 1312 and the side plate 112. It can be seen that the second insulating piece 134 can comprehensively and effectively ensure the insulation between the pole 131 and the shell 11, eliminate the risk of short circuit, and increase the safety performance of the battery.

[0036] Preferably, the pole 131 is assembled in the mounting hole 1141 by riveting or hot pressing, and the pole 131 is made of metal material such as aluminum.

[0037] To facilitate liquid injection and reduce the influence of the liquid injection hole, as shown in Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 , the step structure 114 is provided with a liquid injection hole 115, the liquid injection hole 115 is detachably mounted with a sealing nail 30, and the electrolyte can be injected into the accommodation cavity 113 through the liquid injection hole 115. After injection, the liquid injection hole 115 is sealed by using the sealing nail 30. Preferably, the liquid injection hole 115 and the mounting hole 1141 are arranged separately left and right. Of course, according to actual needs, the liquid injection hole 115 can also be arranged at other parts of the shell 11, for example, as shown in Figure 10 , the liquid injection hole 115 is arranged on the side plate 112. Preferably, the sealing nail 30 is made of metal material.

[0038] As shown in Figure 3 and Figure 5 , in order to better butt and position the cover plate 12 and the shell 11, the outer periphery of the cover plate 12 is provided with an engagement step 121. It is worth noting that the size of the engagement step 121 is small, and the engagement step 121 of the cover plate 12 is connected and fixed with the side plate 112. The engagement step 121 is arranged to more stably and accurately connect with the side plate 112. The cover plate 12 is arranged in a sheet shape, but is not limited thereto.

[0039] As shown in Figure 3 , Figure 4 , Figure 6 andFigure 7 As shown, the electric core 20 is installed in the accommodating cavity 113. The electric core 20 comprises a first polarity tab 21 and a second polarity tab 22. The first polarity tab 21 is electrically connected with the pole assembly 13, and the second polarity tab 22 is electrically connected with the stepped structure 114. At this time, the pole assembly 13 serves as a positive pole of the power supply, and the shell 11 serves as a negative pole of the power supply. The electric core 20 can be made of laminated or wound type, and has a square shape or a substantially square shape.

[0040] During installation, the electric core 20 is installed in the accommodating cavity 113, the pole 131 is welded with the first polarity tab 21, and the second polarity tab 22 is welded with the stepped structure 114. The cover plate 12 is arranged at the opening, and the cover plate 12 is laser welded and sealed with the side plate 112. The electrolyte is injected into the accommodating cavity 113 through the injection hole 115, and the sealing nail 30 is installed in the installation hole 1141 and welded and sealed.

[0041] Figure 5 Figure 8 and Figure 9 In the above, the direction indicated by the arrow Z is from top to bottom.

[0042] The above disclosed is only a preferred embodiment of the present application, and cannot be used to limit the scope of the present application. Therefore, equivalent changes made according to the claims of the present application all belong to the scope covered by the present application.​

Claims

1. A battery housing, characterized by: The battery shell comprises a shell, a cover plate and a pole assembly, the shell comprises a bottom plate and a side plate surrounding the outer periphery of the bottom plate, the bottom plate and the side plate jointly define a receiving cavity with an opening, the bottom plate has a first side edge, a portion of the bottom plate adjacent to the first side edge is recessed into the receiving cavity and forms a stepped structure, the cover plate is arranged at the opening to close the opening, and the pole assembly is mounted on the stepped structure.

2. The battery case of claim 1, wherein, The bottom plate further has a second side edge and a third side edge adjacent to the first side edge, and two ends of the stepped structure extend to the second side edge and the third side edge respectively.

3. The battery case of claim 1, wherein, The stepped structure is provided with a mounting through hole, and the pole assembly is mounted in the mounting through hole.

4. The battery case of claim 3, wherein, The pole assembly comprises a pole and a first insulating member, the pole is arranged in the mounting through hole, at least one end of the pole forms a limiting flange, and the first insulating member is sleeved on the pole and arranged between the limiting flange and the stepped structure, so that the pole is insulated from the shell.

5. The battery case of claim 3, wherein, The pole assembly comprises a pole, a first insulating member, a hardware gasket and a second insulating member, two ends of the pole form a first limiting flange and a second limiting flange respectively, the first limiting flange is arranged outside the shell, the second limiting flange is arranged in the receiving cavity, the hardware gasket is sleeved on the pole and arranged outside the shell, the hardware gasket is connected to the first limiting flange, the first insulating member is arranged between the hardware gasket and the stepped structure, and the second insulating member is sleeved on the pole and arranged between the second limiting flange and the stepped structure.

6. The battery case of claim 5, wherein, The second insulating member is further arranged between the second limiting flange and the side plate.

7. The battery case of claim 6, wherein, The second insulating member comprises a cylindrical portion, a ring-shaped portion and a blocking piece portion, the cylindrical portion is sleeved on the pole, a lower end of the cylindrical portion passes through the first insulating member and is connected to the hardware gasket, the ring-shaped portion is connected to an upper end of the cylindrical portion, the ring-shaped portion is arranged between the second limiting flange and the stepped structure, and the blocking piece portion is connected to the ring-shaped portion and arranged between the second limiting flange and the side plate.

8. The battery case of claim 1, wherein, The stepped structure or the side plate is further provided with a liquid injection through hole, the liquid injection through hole is detachably mounted with a sealing spike, an outer peripheral edge of the cover plate is provided with an engaging step, and the engaging step of the cover plate is connected and fixed with the side plate.

9. A single cell characterized by, The battery shell comprises an electric core and a battery shell as claimed in any one of claims 1-8, and the electric core is mounted in the receiving cavity.

10. The cell according to claim 9, wherein The electric core comprises a first polarity tab and a second polarity tab, the first polarity tab is electrically connected with the pole assembly, and the second polarity tab is electrically connected with the stepped structure.

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